It sounds like maybe money would have been the limiting factor in your case but I don’t know.
You really believe that? I find it extremely hard to believe that the distribution of intelligence for engineering roles at a FAANG company is the same as that of the general population.
It seems far more likely that the distribution is shifted 10-15 points to the right.
Neglectful parents are common.
There are levels to this. I’m same as OP in terms of “looked like they could’ve gone to MIT” but was born in the wrong family. Ended up going to University of Washington after doing some community college - so it’s not like I went to the worst school in the world. But it was a long journey to get there and I do work at a target company now. Again, a very long journey… That could’ve been changed by just an interview or something else entirely.